/******************************************************************************
* The MIT License
* Copyright (c) 2003 Novell Inc.  www.novell.com
* 
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* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including  without limitation the rights
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* copies of the Software, and to  permit persons to whom the Software is 
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in 
* all copies or substantial portions of the Software.
* 
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* SOFTWARE.
*******************************************************************************/
//
// Novell.Directory.Ldap.Utilclass.EnumeratedIterator.cs
//
// Author:
//   Sunil Kumar (Sunilk@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//

using System.Collections;

namespace Novell.Directory.Ldap.Utilclass
{
    /// <summary>
    ///     wrappers a class of type Iterator and makes it act as an Enumerator.  This
    ///     is used when the API requires enumerations be used but we may be using
    ///     JDK1.2 collections, which return iterators instead of enumerators.  Used by
    ///     LdapSchema and LdapSchemaElement
    /// </summary>
    /// <seealso cref="Novell.Directory.Ldap.LdapSchema.AttributeSchemas">
    /// </seealso>
    /// <seealso cref="Novell.Directory.Ldap.LdapSchemaElement.QualifierNames">
    /// </seealso>
    public class EnumeratedIterator : IEnumerator
    {
        private object tempAuxObj;

        public virtual bool MoveNext()
        {
            var result = hasMoreElements();
            if (result)
            {
                tempAuxObj = nextElement();
            }
            return result;
        }

        public virtual void Reset()
        {
            tempAuxObj = null;
        }

        public virtual object Current
        {
            get { return tempAuxObj; }
        }

        private readonly IEnumerator i;

        public EnumeratedIterator(IEnumerator iterator)
        {
            i = iterator;
        }

        /// <summary> Enumeration method that maps to Iterator.hasNext()</summary>
        public bool hasMoreElements()
        {
            return i.MoveNext();
        }

        /// <summary> Enumeration method that maps to Iterator.next()</summary>
        public object nextElement()
        {
            return i.Current;
        }
    }
}